The calculated distance (air line) between L'Hospitalet de Llobregat and Sabadell is approximately 13 miles respectively 20 kilometers.
By car or train, the actual journey to Sabadell is certainly longer, as only the direct route (as the crow flies) between L'Hospitalet de Llobregat and Sabadell has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles